What oil for my gearbox today?

Philippe-J. · Post by **Philippe-J.** » Wed Sep 30, 2026 7:12 am

Hello all,

surprisingly enough, I was enable to find an updated answer to a simple question: what oil should I use for my all synchro Jaguar series 1 gearbox?
In some old posts I found references to oils that are NLA, hence my question today.
Thank you for your insights.

Philippe

Post by **mgcjag** » Wed Sep 30, 2026 7:19 am

Service manual ....4 syncro section....EP90....Steve..Ps one of many gear oil posts viewtopic.php?f=3&t=19749&p=160629&hilit=Mt90#p160629

Philippe-J. · Post by **Philippe-J.** » Wed Sep 30, 2026 8:56 am

Thank you Steve, and sorry for being so inefficient at searching in the previous posts.
I'll order Redline MT90 as it is advised by Andrew.
Philippe

Post by **mgcjag** » Wed Sep 30, 2026 9:00 am

The service manual should be your go to reference....EP90.....some find MT90 better?....some find the gearbox leaks more with it....Steve

Paul bow · Post by **Paul bow** » Fri Oct 02, 2026 9:29 am

MT90 is a fantastic slick oil for the gearbox, used it for years without any problems..highly recommend

Philippe-J. · Post by **Philippe-J.** » Sat Oct 03, 2026 10:36 am

I'll tell you my observations... when I drive the car, which is not tomorrow.
My next step is to start the engine, but I need oil in the gear box for that. Hence my question.
Thanks for your help

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